When publishers or bookstores decide to offer a big discount to vaccinated customers keen to hone their mathematical problem-solving or guesstimation skills, who show their vaccination card and the math book to the cashier—a promotion to
get kids,
parents, and teachers all jabbed to minimize infection or reinfection, not to say, hospitalization.
At a
popular bookstore, the math shot promotion for a set of
four Singapore math textbooks and workbooks is: “$
39 with Shots; $144 sans Shots.”